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PDF SY01-S3 Data sheet ( Hoja de datos )
| Número de pieza | SY01-S3 | |
| Descripción | SYNCHRONOUS EQUIPMENT OCXO BASED STRATUM 3 CLOCK UNIT | |
| Fabricantes | Raltron Electronics Corporation | |
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SY01-S3
SYNCHRONOUS EQUIPMENT
OCXO BASED STRATUM 3 CLOCK UNIT – SY01-S3
Date: May 20 , 2002
• INTRODUCTION
The SY01-S3 is an accurate time and frequency source that has
been designed as a module level subsystem.
The module is designed to work within ATM, SONET, SDH, and
wireless systems where synchronization is vital.
The SY01-S3 is an OCXO based excellent synchronization
solution for timing designed for Stratum 3 applications.
• FEATURES
A Hardware/Software synchronization solution for timing, jitter and wander concerns in a single module.
Complies with ITU-T Recommendations G.813 and ETSI-ETS 300 462-4 and Bellcore GR-1244-CORE for Stratum
3 applications.
Supports four modes of operation: Locked to Reference 1, Locked to Reference 2, Holdover and Free-run.
Accepts reference inputs from two independent sources from 8 kHz to 77.76 MHz.
Provides two outputs up to 77.76 MHz.
Loop filtering utilizing application specific software in the digital signal processor (DSP).
Continuously monitors and evaluate input reference signals.
Creates a history buffer for Holdover mode operation.
Alarm and status signal.
Host interface and JTAG port.
Small dimensions of 1.80X1.80X 0.65 inch (open pkg)
• APPLICATION
The SY01-S3 performs clock regeneration as a Synchronous Equipment Clock (SEC), or STRATUM 3 in ATM, SDH,
PDH, and SONET networks. It is designed for manufacturers of network equipment, especially Access Switches, Core
Switches, Cross Connects, Digital Multiplexers-Exchangers, and SDH/SONET equipment. The unit is also suitable for
PCS, WLL, and Wireless Base Stations. Wherever a Timing unit with high performance specifications is required, the
SY01-S3 can be integrated into the network system and provide all necessary frequencies and interfaces. The input
stage can receive two different input reference signals at various rates from 4 kHz to 77.76 MHz. An optional
application can be achieved by integrating the SY01-S3 with a low cost GPS receiver and locking it to the GPS 1 pps
output signal.
RALTRON ELECTRONICS CORP. § 10651 N.W.19th St § Florida 33172 § U.S.A.
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SYNCHRONOUS EQUIPMENT
OCXO BASED STRATUM 3 CLOCK UNIT – SY01-S3
• PIN ASSIGNMENT
On the picture below it is shown the pin-out for the SY01-S3. The design is done in such a way that is can support
basically any other pin-out without changes in the hardware. For other pin-out requirement please contact the Raltron.
+5V
EX REF1
GND
EX REF 2
GND
OPT OUT
GND
OUT
GND
18
17
16
15
14
13
12
11
10
1 HOLDOVER
2 REF 1
3 REF2
4 FREERUN
5 GND
6 ALARM OUT
7 CNT 1
8 CNT 2
9 PLL UNLOCK
Figure 4 – Bottom view
Pin #
1
2
3
4
6
7
8
9
5,10,12,14,16
18
11
13
17
15
Name
Description
HOLDOVER Holdover Signal -> the output is high when the unit is in holdover mode
REF 1
Reference 1 Signal -> the output is high when the unit is using the reference 1
REF 2
Reference 2 Signal -> the output is high when the unit is using the reference 2
FREERUN Free-run Signal -> the output is high when the unit is in the free run mode
ALARM OUT
Alarm signal -> the output is high when there is an alarm in the module, alarm
condition is during free-run mode, holdover mode,
CNT 1
Control Input 1 -> the external input for selecting mode of the unit – see table.
CNT 2
Control Input 2 -> the external input for selecting mode of the unit – see table.
PLL UNLOCK
PLL Unlocked Signal -> the output is high when the unit is not locked to any of the
references
GND
Ground
+5V Positive Voltage Supply
OUT
Synchronized Output -> the output of the synchronized signal, for frequency
range see table below.
OPT OUT
Optional Output -> the secondary output of the synchronized signal, for frequency
range see table below.
EX REF 1
External Reference 1 Input -> the input signal from reference 1
EX REF 2
External Reference 2 Input -> the input signal from reference 2
For other pin-out configurations contact the factory!
RALTRON ELECTRONICS CORP. § 10651 N.W.19th St § Florida 33172 § U.S.A.
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